Height detection laser device of safety belt and detection method of height detection laser device

Abstract

The invention relates to a height detection laser device of a safety belt and a detection method thereof, the height detection laser device comprises a laser host, a main laser device and at least one auxiliary laser device, the main laser device comprises a plurality of first laser detection pieces; the auxiliary laser device comprises a plurality of second laser detection pieces; the main laser device and the auxiliary laser device are each provided with a plurality of containing planes and containing grooves, each containing groove is located in the corresponding containing plane, and the containing planes face different directions. The main laser device and the auxiliary laser device are arranged to jointly measure the front face operation height and the back face operation height of an operator, and the accuracy of measured data can be improved. According to the invention, the working height of the operator is acquired, the acquired working height data is filtered and calculated, the actual working height of the operator is finally obtained, and the working height data is transmitted to the server through the laser host for monitoring, so that the intelligent degree is obviously improved, and the accuracy of the measured data is relatively high.

Description

Technical Field

[0001] The invention relates to the technical field of aerial work, and more specifically to a safety belt height detection laser device and a detection method thereof. Background Art

[0002] Safety belts are mainly used as protective equipment to prevent people from falling. Anyone who falls from a height of 2m or more (including 2m) above the reference plane must wear a safety belt as required by regulations.

[0003] At present, the intelligent level of safety belts on the market is low, and they cannot measure the working height of the operator and monitor the operator, which is prone to safety hazards. Or the measuring tool is used to measure the safety rope to obtain the working height of the operator, and the measurement result is inaccurate. Summary of the invention

[0004] The technical problem to be solved by the present invention is that the safety belts in the prior art have a low level of intelligence and are unable to obtain the operator's working height or the measurement results are inaccurate. In view of the above-mentioned defects of the prior art, a safety belt height detection laser device and a detection method thereof are provided.

[0005] The technical solution adopted by the present invention to solve its technical problem is: A safety belt height detection laser device is constructed, which includes a laser host, a main laser device and at least one auxiliary laser device, wherein the laser host is electrically connected to the main laser device and the auxiliary laser device respectively; the main laser device includes a plurality of first laser detection components for detecting the back working height; the auxiliary laser device includes a plurality of second laser detection components for detecting the front working height; the main laser device and the auxiliary laser device are respectively provided with a plurality of placement planes and placement grooves, each of the placement grooves is respectively located in each of the placement planes, and the orientations of the placement planes are different; the first laser detection component and the second laser detection component are respectively located in the placement grooves.

[0006] Furthermore, the main laser device comprises an upper shell, a lower shell and a pad, wherein the upper shell and the pad are respectively arranged on both sides of the lower shell; The upper shell is provided with at least one positioning column, and the lower shell and the pad are respectively provided with positioning holes corresponding to the positioning column, and the positioning column passes through the positioning hole.

[0007] Furthermore, the upper shell is provided with a plurality of first engaging portions, and the lower shell is provided with a plurality of second engaging portions corresponding to the first engaging portions; The first laser detection member is respectively engaged between the first engaging portion and the second engaging portion.

[0008] Furthermore, each of the first engaging portions includes a plurality of sheets, and the plurality of sheets are arranged in an array in the upper shell; each of the sheets is provided with a notch, and the plurality of notches form a first engaging position.

[0009] Furthermore, each of the second engaging parts includes a block, which is fixedly connected to the lower shell; the block is provided with an inclined groove, which is arc-shaped and corresponds to the first laser detection component; the inclined groove includes a first inclined surface and a second inclined surface, the first inclined surface is in contact with the first surface of the first laser detection component, and the second inclined surface is in contact with the second surface of the first laser detection component; the first inclined surface and the second inclined surface form a second clamping position; the first laser detection component is respectively clamped between the first clamping position and the second clamping position.

[0010] Furthermore, the placement grooves are respectively provided with openings; and the detection ports of the first laser detection component and the second laser detection component are respectively oriented toward the openings.

[0011] Furthermore, the auxiliary laser device includes a first shell, a second shell and a fixing plate, the first shell and the fixing plate are respectively arranged on both sides of the second shell; the first shell is provided with a plurality of first fixing parts, and the second shell is provided with a plurality of second fixing parts; each of the first fixing parts includes a third clamping position; each of the second fixing parts includes a fourth clamping position; the second laser detection component is respectively clamped between the third clamping position and the fourth clamping position.

[0012] Furthermore, the inclined grooves are respectively provided with rounded corners, and the rounded corners are in contact with the first surface.

[0013] Furthermore, the main laser device includes an angle measuring component for measuring the bending angle of a human body, a communication component for receiving data, a temperature measuring component, a humidity measuring component and an area positioning component, and the angle measuring component is movably arranged between the upper shell and the lower shell; the communication component, the temperature measuring component, the humidity measuring component and the area positioning component are respectively arranged in the upper shell.

[0014] The present invention proposes a detection method of a seat belt height detection laser device, comprising: The height value of the operator is obtained by using the main laser device and the auxiliary laser device; Acquire height values ​​at multiple angles by using the main laser device and the auxiliary laser device, and take the height value with the largest value as the maximum laser height; Performing primary filtering and secondary filtering on the maximum laser height to obtain an effective laser height; The working height is obtained by calculating according to the effective laser height.

[0015] Furthermore, the step of performing primary filtering and secondary filtering on the maximum laser height to obtain an effective laser height includes: Primary filtering: judging whether the human body bending value is within a preset range through a preset angle measuring component; wherein the preset range is 40°-140°; If yes, it is determined as the effective laser height; If not, then retrieve the effective laser height of the previous time; Secondary filtering: within a preset time period, the effective laser height is compared with the first maximum laser height, the second maximum laser height and the third maximum laser height; wherein the first maximum laser height, the second maximum laser height and the third maximum laser height are the effective laser heights of the first three times; If the effective laser height, the first maximum laser height, the second maximum laser height and the third maximum laser height are respectively ≥ 2m, it is determined to be high altitude, and the effective laser height is selected; If the effective laser height, the first maximum laser height, the second maximum laser height and the third maximum laser height are respectively less than 2 m, it is determined to be low altitude and is not selected.

[0016] Furthermore, the calculation process of the working height is: Working height = effective laser height - operator height.

[0017] The beneficial effect of the present invention is that a main laser device and an auxiliary laser device are provided to jointly measure the front working height and the back working height of the operator, which can improve the accuracy of the measurement data. In addition, a plurality of first laser detection parts and second laser detection parts are provided, and different orientations are set to adapt to the changes in the body angle of the operator during the operation, and the acquired working height data is filtered and calculated, and finally the actual working height of the operator is obtained, and the working height data is transmitted to the server through the laser host to monitor the operator, the degree of intelligence is significantly improved, and the accuracy of the measured data is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an overall structural diagram of a safety belt height detection laser device in one embodiment of the present invention; Figure 2 is a schematic diagram of an explosion of a main laser device in one embodiment of the present invention; Figure 3 is a three-dimensional schematic diagram of an upper housing in one embodiment of the present invention; Figure 4 is a three-dimensional schematic diagram of a lower housing in one embodiment of the present invention; Figure 5It is a three-dimensional schematic diagram of a first laser detection component installed on a lower housing in one embodiment of the present invention; Figure 6 is a three-dimensional schematic diagram of another angle of the first laser detection element installed on the lower housing in one embodiment of the present invention; Figure 7 is a schematic diagram of an explosion of an auxiliary laser device in one embodiment of the present invention; Figure 8 is a three-dimensional schematic diagram of a first housing in one embodiment of the present invention; Fig. 9 is an exploded schematic diagram of the auxiliary laser device at another angle in one embodiment of the present invention; Fig.10 The invention discloses a detection method of a seat belt height detection laser device in one embodiment of the present invention.

[0019] Explanation of reference numerals: laser host 1, main laser device 2, auxiliary laser device 3, first laser detection component 201, second laser detection component 301, placement plane 4, placement groove 5, upper shell 202, lower shell 203, pad 204, positioning column 205, first clamping part 207, second clamping part 208, sheet 209, notch 210, first clamping position 211, block 212, inclined groove 213, first inclined surface 214, second inclined surface 215, first surface 216, second surface 217, second clamping position 218, opening 501, detection port 219, rounded corner 220, first shell 302, second shell 303, fixing sheet 304, first fixing part 305, second fixing part 306, third clamping position 307, fourth clamping position 308. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0021] Please refer to Figure 1 The present invention proposes a safety belt height detection laser device, comprising a laser host 1, a main laser device 2 and at least one auxiliary laser device 3, the laser host 1 is electrically connected to the main laser device 2 and the auxiliary laser device 3 respectively; the main laser device 2 includes a plurality of first laser detection components 201 for detecting the back working height; the auxiliary laser device 3 includes a plurality of second laser detection components 301 for detecting the front working height; the main laser device 2 and the auxiliary laser device 3 are respectively provided with a plurality of placement planes 4 and placement grooves 5, each placement groove 5 is respectively located in each placement plane 4, and the orientations of the placement planes 4 are different; the first laser detection component 201 and the second laser detection component 301 are respectively located in the placement grooves 5.

[0022] In this embodiment, the main laser device 2 and the auxiliary laser device 3 are respectively connected to the laser host 1 by wires, and the auxiliary laser device 3 transmits data to the main laser device 2. Finally, the main laser device 2 summarizes the data and transmits the data to the laser host 1 through the data line. The main laser device 2 can be fixed on the back of the safety belt, or can be detachably installed on the back of the safety belt, and measure the working height of the operator's back; the auxiliary laser device 3 is set on the front of the safety belt, and can measure the working height of the operator's front. Setting the main laser device 2 and the auxiliary laser device 3 on the safety belt can transmit data and measure the working height, which is more intelligent and can achieve automatic detection.

[0023] Specifically, Figure 2 and Figure 7 As shown, the main laser device 2 is provided with a plurality of first laser detection elements 201, and the auxiliary laser device 3 is provided with a plurality of second laser detection elements 301. The first laser detection elements 201 and the second laser detection elements 301 are laser rangefinders or laser rangefinder sensors. Preferably, there are five first laser detection elements 201 and three second laser detection elements 301, which can detect the working height of the operator from different angles.

[0024] like Figure 2 As shown, the main laser device 2 and the auxiliary laser device 3 are respectively provided with a plurality of placement planes 4 and placement grooves 5, the placement planes 4 are respectively arranged in different directions, and each placement groove 5 is respectively located in each placement plane 4. In the main laser device 2, the first laser detection element 201 is respectively located in the placement groove 5, and since the placement planes 4 are arranged in different directions, the first laser detection element 201 can measure the working height at different angles. In the auxiliary laser device 3, the second laser detection element 301 is respectively located in the placement groove 5, and since the placement planes 4 are arranged in different directions, the second laser detection element 301 can measure the working height at different angles.

[0025] More specifically, on the basis of the main laser device 2, an auxiliary laser device 3 is added to avoid the phenomenon that when the operator is working at high altitude, there is an obstruction behind him, and the data cannot be measured or the measurement result is inaccurate. The addition of the auxiliary laser device 3 can further measure the working height and improve the data accuracy.

[0026] In one embodiment, the main laser device 2 includes an upper shell 202, a lower shell 203 and a pad 204, and the upper shell 202 and the pad 204 are respectively arranged on both sides of the lower shell 203; the upper shell 202 is provided with at least one positioning column 205, and the lower shell 203 and the pad 204 are respectively provided with positioning holes corresponding to the positioning column 205, and the positioning column 205 passes through the positioning hole.

[0027] Specifically, Figure 2 and Figure 3 As shown, the main laser device 2 is provided with an upper shell 202, a lower shell 203 and a pad 204. During installation, the lower shell 203 is installed on the top of the pad 204, and then the first laser detection component 201 is installed respectively, and then the upper shell 202 is covered, and finally the pad 204, the lower shell 203 and the upper shell 202 are tightened and fixed by screws or bolts.

[0028] More specifically, the upper shell 202 is further provided with a positioning post 205. When the upper shell 202 is installed, the positioning post 205 is aligned with the corresponding positioning hole of the lower shell 203 and then installed, so that the upper shell 202 can be positioned to avoid the phenomenon of wrong installation. Figure 3 As shown, the positioning post 205 can be a round post, and the positioning hole is a round hole. The positioning post 205 can also be a square post. When the positioning post 205 is a square post, the positioning hole is a square hole to cooperate with the positioning post 205 for installation.

[0029] Please refer to Figure 3 and Figure 4 The upper shell 202 is provided with a plurality of first engaging parts 207 , and the lower shell 203 is provided with a plurality of second engaging parts 208 corresponding to the first engaging parts 207 ; the first laser detection member 201 is respectively engaged between the first engaging parts 207 and the second engaging parts 208 .

[0030] In a specific implementation, the first laser detection component 201 is respectively engaged between the first engaging portion 207 and the second engaging portion 208 , so as to avoid the first laser detection component 201 from loosening during high-altitude operations and avoid inaccurate measurement results.

[0031] Please refer to Figure 3 Each first engaging portion 207 includes a plurality of sheets 209 , and the plurality of sheets 209 are arranged in an array in the upper housing 202 ; each sheet 209 is provided with a notch 210 , and the plurality of notches 210 form a first engaging position 211 .

[0032] In a specific implementation, the first engaging portion 207 includes a plurality of sheets 209, which are arranged perpendicularly to the inner top surface of the upper shell 202, and are evenly arranged on the inner top surface of the upper shell 202. The plurality of sheets 209 are respectively provided with notches 210, and the plurality of notches 210 form a first engaging position 211, which can engage part of the first laser detection component 201 in the upper shell 202.

[0033] Please refer to Figure 4-Figure 6Each second engaging portion 208 includes a block 212, which is fixedly connected to the lower shell 203; the block 212 is provided with an inclined groove 213, which is arc-shaped and corresponds to the first laser detection component 201; the inclined groove 213 includes a first inclined surface 214 and a second inclined surface 215, the first inclined surface 214 is in contact with the first surface 216 of the first laser detection component 201, and the second inclined surface 215 is in contact with the second surface 217 of the first laser detection component 201; the first inclined surface 214 and the second inclined surface 215 form a second clamping position 218; the first laser detection component 201 is respectively clamped between the first clamping position 211 and the second clamping position 218.

[0034] In the specific implementation: the second clamping part 208 is arranged corresponding to the first clamping part 207, one second clamping part 208 corresponds to one first clamping part 207, and the first laser detection part 201 is fixed. Each block 212 is respectively provided with an inclined groove 213, which is arc-shaped and arranged at an angle corresponding to the shape of the first laser detection part 201, so as to better fit the first laser detection part 201. In addition, the inclined groove 213 includes a first inclined surface 214 and a second inclined surface 215. After the first laser detection part 201 is placed in the inclined groove 213, the first inclined surface 214 can fit with the first surface 216 of the first laser detection part 201, and the second inclined surface 215 can fit with the second surface 217 of the first laser detection part 201. Among them, the first surface 216 is the bottom surface of the first laser detection part 201, and the second surface 217 is the back surface of the first laser detection part 201. The first inclined surface 214 is connected to the second inclined surface 215 to form a second clamping position 218. The first clamping position 211 and the second clamping position 218 together restrict the first laser detection component 201 to prevent the first laser detection component 201 from being displaced and affecting the measurement result.

[0035] Please refer to Figure 4 and Figure 5 The inclined grooves 213 are respectively provided with rounded corners 220 , and the rounded corners 220 are in contact with the first surface 216 .

[0036] In a specific implementation, the inclined groove 213 is provided with a rounded corner 220 , which can have a buffering effect compared to the contact of the folded corner, is not easily worn, and can increase the service life.

[0037] Please refer to Figure 2 The placement grooves 5 are respectively provided with openings 501 ; the detection ports 219 of the first laser detection element 201 and the second laser detection element 301 are respectively facing the openings 501 .

[0038] In a specific implementation, the detection ports 219 of the first laser detection element 201 and the second laser detection element 301 are respectively installed toward the direction of the opening 501 to project lasers to detect the height.

[0039] Please refer to Figure 7 The auxiliary laser device 3 includes a first shell 302 , a second shell 303 and a fixing plate 304 , and the first shell 302 and the fixing plate 304 are respectively arranged on both sides of the second shell 303 .

[0040] In specific implementation, the auxiliary laser device 3 includes a first housing 302, a second housing 303 and a fixing plate 304. The first housing 302 and the second housing 303 are respectively provided with a plurality of mounting holes. After the mounting holes on the first housing 302 are aligned with the mounting holes on the second housing 303, they are fixed with screws or pins. The fixing plate 304 is also provided with mounting holes and can be installed on the safety belt to fix the auxiliary laser device 3.

[0041] Please refer to Figure 8 and Fig. 9 The first shell 302 is provided with a plurality of first fixing parts 305, and the second shell 303 is provided with a plurality of second fixing parts 306; each first fixing part 305 includes a third clamping position 307; each second fixing part 306 includes a fourth clamping position 308; the second laser detection component 301 is respectively clamped between the third clamping position 307 and the fourth clamping position 308.

[0042] In specific implementation: the first fixing portion 305 is located on the inner surface of the first shell 302, the second fixing portion 306 is located on the upper surface of the second shell 303, and after the second laser detection component 301 is respectively installed in the fourth clamping position 308 provided in the second shell 303, the first shell 302 is covered. At this time, the third clamping position 307 provided in the first shell 302 can just contact with the second laser detection component 301, and fix the second laser detection component 301 together with the fourth clamping position 308.

[0043] Please refer to Figure 2 The main laser device 2 includes an angle measuring component for measuring the bending angle of the human body, a communication component for receiving data, a temperature measuring component, a humidity measuring component and a regional positioning component. The angle measuring component is movably arranged between the upper shell 202 and the lower shell 203; the communication component, the temperature measuring component, the humidity measuring component and the regional positioning component are respectively arranged in the upper shell 202.

[0044] In specific implementation: the angle measuring component is a gyroscope, which can measure the bending angle of the operator when performing the operation. The communication component is a data receiving module, which can receive data from other components on the safety belt, such as hooks and buckles. The temperature measuring component is a thermometer, which can measure the temperature of the operator's working environment. The humidity measuring component is a hygrometer, which can measure the humidity of the working environment. After measuring the temperature and humidity, the operator's environment can be monitored in time to prevent the operator from working in a harsh environment. The area positioning component is a UWB module, Ultra Wide Band, wireless communication carrier module, which can identify the operator's working area to find out whether the operator is in the working area to work.

[0045] Please refer to Fig.10 The present invention proposes a detection method of a seat belt height detection laser device, comprising: S1, obtaining the height value of the operator through the main laser device 2 and the auxiliary laser device 3; S2, obtaining height values ​​at multiple angles through the main laser device 2 and the auxiliary laser device 3, and taking the height value with the largest value as the maximum laser height; S3, performing primary filtering and secondary filtering on the maximum laser height to obtain the effective laser height; S3-1, primary filtering: judging whether the human body bending value is within a preset range through a preset angle measuring component; wherein the preset range is 40°-140°; S3-2, if yes, determine it as a valid laser height; if no, retrieve the previous valid laser height; S3-3, secondary filtering: within a preset time period, comparing the effective laser height with the first maximum laser height, the second maximum laser height and the third maximum laser height; wherein the first maximum laser height, the second maximum laser height and the third maximum laser height are the effective laser heights of the first three times; S3-4, if the effective laser height, the first maximum laser height, the second maximum laser height and the third maximum laser height are ≥ 2m respectively, it is determined to be high altitude and the effective laser height is selected; if the effective laser height, the first maximum laser height, the second maximum laser height and the third maximum laser height are < 2m respectively, it is determined to be low altitude and is not selected; S4, calculate according to the effective laser height to obtain the working height.

[0046] In this embodiment, after the main laser device 2 is turned on, the height of the operator will be measured first, that is, the current laser height after the power-on is the height of the operator, so as to obtain the height value of the operator. Then, the first laser detection component 201 of the main laser device 2 and the second laser detection component 301 of the auxiliary laser device 3 measure the working height of the operator at different angles to obtain the height values ​​of multiple angles; a controller is provided in the laser host 1, and the controller obtains the height value and selects the height value with the largest value as the maximum laser height. The operator will have working postures at different angles during the operation, which will affect the calculation of the working height. Since the human body cannot climb when the bending angle is too high, the maximum laser height is only valid when the operator stands normally or bends slightly, so the maximum laser height obtained will be filtered first. That is, the angles of the X-axis, Y-axis and Z-axis directions of the human body bending are measured by the gyroscope, and the selection is made when the human body bending value is between 40° and 140°, wherein the range of the human body bending value can be optimized and set according to actual needs. If it is not within the preset range, the previous effective laser height is retrieved. Then, a secondary filtration is performed to compare the current effective laser height with the previous three consecutive effective laser heights, namely, the first maximum laser height, the second maximum laser height, and the third maximum laser height. In a specific embodiment, the preset time period is 1s. If the height values ​​of the effective laser height, the first maximum laser height, the second maximum laser height, and the third maximum laser height at an interval of 1 second are all ≥2m, it is determined to be high altitude, and this effective height is selected. If the height values ​​of the effective laser height, the first maximum laser height, the second maximum laser height, and the third maximum laser height are three times in a row and at an interval of 1 second are all <2m, it is determined to be low altitude, and no selection is made, which can reduce misjudgment. Finally, the most effective laser height is calculated to obtain the working height. The calculation process of the working height is: working height = effective laser height - operator height value.

[0047] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, device, article or method including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, device, article or method. In the absence of further restrictions, an element defined by the sentence "includes a ..." does not exclude the presence of other identical elements in the process, device, article or method including the element.

[0048] The above description is only a preferred embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A seat belt height detection laser device, characterized in that: It comprises a laser host, a main laser device and at least one auxiliary laser device, wherein the laser host is electrically connected to the main laser device and the auxiliary laser device respectively; The main laser device includes a plurality of first laser detection elements for detecting the back working height; The auxiliary laser device includes a plurality of second laser detection elements for detecting the front working height; The main laser device and the auxiliary laser device are respectively provided with a plurality of placement planes and placement grooves, each of the placement grooves is respectively located in each of the placement planes, and the orientations of the placement planes are different; The first laser detection component and the second laser detection component are respectively located in the placement grooves.

2. The seat belt height detection laser device according to claim 1, characterized in that: The main laser device comprises an upper shell, a lower shell and a pad, wherein the upper shell and the pad are respectively arranged on both sides of the lower shell; The upper shell is provided with at least one positioning column, and the lower shell and the pad are respectively provided with positioning holes corresponding to the positioning column, and the positioning column passes through the positioning hole.

3. The seat belt height detection laser device according to claim 2, characterized in that: The upper shell is provided with a plurality of first engaging parts, and the lower shell is provided with a plurality of second engaging parts corresponding to the first engaging parts; The first laser detection member is respectively engaged between the first engaging portion and the second engaging portion.

4. The seat belt height detection laser device according to claim 3, characterized in that: Each of the first engaging portions includes a plurality of sheets, and the plurality of sheets are arranged in an array in the upper housing; Each of the sheets is provided with a notch, and a plurality of the notches form a first clamping position.

5. The seat belt height detection laser device according to claim 4, characterized in that: Each of the second engaging parts includes a block, and the block is fixedly connected to the lower shell; The block is provided with an oblique groove, which is arc-shaped and corresponds to the first laser detection element; The inclined groove includes a first inclined surface and a second inclined surface, the first inclined surface is in contact with the first surface of the first laser detection component, and the second inclined surface is in contact with the second surface of the first laser detection component; The first inclined surface and the second inclined surface form a second locking position; The first laser detection member is respectively engaged between the first engaging position and the second engaging position.

6. The seat belt height detection laser device according to claim 1, characterized in that: The placement grooves are respectively provided with openings; the detection ports of the first laser detection component and the second laser detection component are respectively oriented toward the openings.

7. The seat belt height detection laser device according to claim 1, characterized in that: The auxiliary laser device comprises a first shell, a second shell and a fixing plate, wherein the first shell and the fixing plate are respectively arranged on two sides of the second shell; The first shell is provided with a plurality of first fixing parts, and the second shell is provided with a plurality of second fixing parts; Each of the first fixing portions includes a third latching position; Each of the second fixing portions comprises a fourth latching position; The second laser detection member is respectively engaged between the third engaging position and the fourth engaging position.

8. The seat belt height detection laser device according to claim 5, characterized in that: The inclined grooves are respectively provided with rounded corners, and the rounded corners are in contact with the first surface.

9. The seat belt height detection laser device according to claim 2, characterized in that: The main laser device comprises an angle measuring component for measuring the bending angle of a human body, a communication component for receiving data, a temperature measuring component, a humidity measuring component and an area positioning component, and the angle measuring component is movably arranged between the upper shell and the lower shell; The communication component, the temperature measuring component, the humidity measuring component and the area positioning component are respectively arranged in the upper shell.

10. A detection method of a seat belt height detection laser device, characterized in that: include: The height value of the operator is obtained by using the main laser device and the auxiliary laser device; Acquire height values ​​at multiple angles by using the main laser device and the auxiliary laser device, and take the height value with the largest value as the maximum laser height; Performing primary filtering and secondary filtering on the maximum laser height to obtain an effective laser height; The working height is obtained by calculating according to the effective laser height.

11. The detection method of the seat belt height detection laser device according to claim 10, characterized in that: The step of performing primary filtering and secondary filtering on the maximum laser height to obtain an effective laser height includes: Primary filtering: judging whether the human body bending value is within a preset range through a preset angle measuring component; wherein the preset range is 40°-140°; If yes, it is determined as the effective laser height; If not, then retrieve the effective laser height of the previous time; Secondary filtering: within a preset time period, the effective laser height is compared with the first maximum laser height, the second maximum laser height and the third maximum laser height; wherein the first maximum laser height, the second maximum laser height and the third maximum laser height are the effective laser heights of the first three times; If the effective laser height, the first maximum laser height, the second maximum laser height and the third maximum laser height are respectively ≥ 2 m, it is determined to be high altitude, and the effective laser height is selected; If the effective laser height, the first maximum laser height, the second maximum laser height and the third maximum laser height are respectively less than 2 m, it is determined to be low altitude and is not selected.

12. The detection method of the seat belt height detection laser device according to claim 10, characterized in that: The calculation process of the working height is: Working height = effective laser height - operator height.

Images